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This is the documentation for Cloudera Impala 2.1.x.
Documentation for other versions is available at Cloudera.com.

Impala Administration

As an administrator, you monitor Impala's use of resources and take
action when necessary to keep Impala running smoothly and avoid
conflicts with other Hadoop components running on the same cluster.
When you detect that an issue has happened or could happen in the future,
you reconfigure Impala or other components such as HDFS or even the hardware of the cluster itself to resolve
or avoid problems.

Dividing cluster resources such as memory between Impala and other components,
using YARN for overall resource management, and Llama to mediate resource requests
from Impala to YARN.
See Integrated Resource Management with YARN for details.